You sound like an addict defending their drug of choice because it stops their shaking.
Saying Facebook is useful for networking is like saying meth is useful for staying awake. Maybe technically true, but it ignores the costs of getting there. The reality is there are countless healthier ways of achieving your same objectives of using Facebook that doesn't facilitate the enormous social costs associated with using their platform. Usefulness cannot be measured on one aspect alone. Or rather, something having one useful function does not make it useful when balanced against its cost. So yes, I still argue that Facebook is utterly useless, whether you take me seriously or not.
Dude went from a homeless addict to a millionaire and decided to throw it all away for Trump. Incredible.